:root {
  --bg: #f7f8f8;
  --surface: #ffffff;
  --surface-soft: #f1f5f3;
  --text: #18211d;
  --muted: #65716b;
  --line: #d9e0dd;
  --line-strong: #aebbb5;
  --accent: #0b8f78;
  --accent-soft: #dff4ef;
  --shadow: 0 18px 40px rgba(24, 33, 29, 0.12);
  --hour-height: 64px;
  --grid-height: 960px;
  --radius: 8px;
  font-family: Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--bg);
}

body.settings-open {
  overflow: hidden;
}

button,
input,
select {
  font: inherit;
  letter-spacing: 0;
}

button {
  cursor: pointer;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1rem clamp(0.85rem, 2vw, 1.5rem);
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.titles {
  min-width: 0;
}

.title {
  display: block;
  font-size: 1.35rem;
  font-weight: 750;
  line-height: 1.2;
}

.subtitle {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.35;
}

.status {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.aside {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.week-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
}

.link-button,
.settings-button,
.icon-button,
.settings-action {
  min-height: 2.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 0.4rem 0.6rem;
}

.link-button:hover,
.settings-button:hover,
.icon-button:hover,
.settings-action:hover {
  border-color: var(--line-strong);
  background: var(--surface-soft);
}

.settings-button,
.settings-action.primary {
  border-color: transparent;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
}

.settings-button:hover,
.settings-action.primary:hover {
  background: #087964;
}

.schedule-summary {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.85rem clamp(0.85rem, 2vw, 1.5rem) 0;
}

.schedule-summary p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted);
  padding: 0.25rem 0.45rem;
  font-size: 0.78rem;
  white-space: nowrap;
}

.grid-container {
  padding: 1rem clamp(0.85rem, 2vw, 1.5rem) 2rem;
}

.grid-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.timetable {
  display: grid;
  grid-template-columns: [hour-column-start] 54px [hour-column-end] repeat(var(--day-count), minmax(158px, 1fr));
  grid-template-rows: [day-row-start] 42px [day-row-end] repeat(var(--hour-count), var(--hour-height));
  min-width: 820px;
  overflow: visible;
}

.grid-day {
  grid-row: day-row-start / day-row-end;
  align-self: stretch;
  justify-self: stretch;
  display: grid;
  place-items: center;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 700;
  text-transform: capitalize;
}

.grid-hour {
  grid-column: hour-column-start / hour-column-end;
  align-self: start;
  justify-self: end;
  padding-right: 0.45rem;
  color: var(--muted);
  font-size: 0.74rem;
  transform: translateY(-0.55em);
}

.grid-complete-row {
  grid-column: 1 / -1;
  margin: -0.5px;
  border-top: 1px solid var(--line);
  pointer-events: none;
}

.grid-day-column {
  grid-row: day-row-end / span var(--hour-count);
  position: relative;
  height: var(--grid-height);
  display: block;
  padding: 0 3px;
  border-left: 1px solid var(--line);
}

.grid-day-column.today {
  background: rgba(11, 143, 120, 0.05);
}

.grid-entry {
  position: absolute;
  top: var(--event-top);
  left: calc(4px + ((100% - 8px) / var(--event-lanes)) * var(--event-lane));
  width: calc(((100% - 8px) / var(--event-lanes)) - 4px);
  height: var(--event-height);
  min-height: 48px;
  display: flex;
  border: 1px solid rgba(24, 33, 29, 0.08);
  border-left: 4px solid rgba(24, 33, 29, 0.3);
  border-radius: var(--radius);
  background: var(--entry-color);
  color: var(--text);
  box-shadow: 0 6px 14px rgba(24, 33, 29, 0.08);
  overflow: visible;
}

.grid-entry .description {
  min-width: 0;
  width: 100%;
  padding: 0.38rem 0.45rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.3rem;
}

.grid-entry .row {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.link-subject {
  display: inline-block;
  max-width: calc(100% - 2.1rem);
  color: var(--text);
  font-size: 0.96rem;
  font-weight: 800;
  text-decoration: none;
  vertical-align: bottom;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.entry-type {
  display: inline-block;
  color: rgba(24, 33, 29, 0.75);
  font-size: 0.75rem;
  font-weight: 700;
}

.link-classroom {
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.link-teacher {
  color: var(--muted);
  font-size: 0.78rem;
  font-style: normal;
  text-decoration: none;
}

.link-group {
  color: rgba(24, 33, 29, 0.55);
  font-size: 0.68rem;
}

.entry-hover {
  display: none;
  position: absolute;
  bottom: calc(100% - 0.35rem);
  left: 0.75rem;
  width: 17rem;
  max-width: min(17rem, 80vw);
  padding: 0.55rem;
  z-index: 50;
  color: var(--text);
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 0.76rem;
  line-height: 1.4;
  text-align: left;
  white-space: normal;
}

.grid-entry:hover .entry-hover,
.grid-entry:focus-within .entry-hover {
  display: block;
}

.mobile-schedule {
  display: none;
}

.mobile-day {
  margin-bottom: 1rem;
}

.mobile-day h3 {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: capitalize;
}

.mobile-day .grid-entry {
  position: relative;
  top: auto;
  left: auto;
  width: auto;
  height: auto;
  min-height: 5.2rem;
  margin: 0 0 0.45rem;
}

.empty-state {
  padding: 2rem 0.5rem;
  text-align: center;
  color: var(--muted);
}

.settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(0, 0, 0, 0.28);
}

.settings-backdrop[hidden],
.settings-panel[hidden] {
  display: none;
}

.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 90;
  width: min(30rem, 100vw);
  height: 100vh;
  padding: 1rem;
  background: var(--surface);
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: auto;
  transform: translateX(100%);
  transition: transform 160ms ease;
}

.settings-panel.open {
  transform: translateX(0);
}

.settings-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.settings-header h2,
.settings-header p {
  margin: 0;
}

.settings-header h2 {
  font-size: 1.15rem;
}

.settings-header p,
.import-status {
  margin: 0.35rem 0 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.4;
}

.field {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.8rem;
}

.compact-field {
  margin-top: 1rem;
}

.field span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

select,
input[type="search"],
input[type="url"] {
  width: 100%;
  min-height: 2.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--text);
  padding: 0.45rem 0.55rem;
}

button:focus-visible,
select:focus,
input[type="search"]:focus,
input[type="url"]:focus,
.grid-entry:focus-visible {
  outline: 2px solid rgba(11, 143, 120, 0.35);
  outline-offset: 2px;
}

.source-actions,
.filter-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

.export-action {
  grid-column: 1 / -1;
}

.filter-actions {
  margin: 1rem 0;
}

.filter-list {
  display: grid;
  gap: 0.65rem;
}

.filter-group {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.65rem;
  background: #ffffff;
}

.filter-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.5rem;
  font-weight: 800;
}

.filter-title span:nth-child(2) {
  min-width: 0;
  overflow-wrap: anywhere;
}

.filter-kind {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
}

.color-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  background: var(--subject-color);
  flex: 0 0 auto;
}

.toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 1.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.25rem 0.45rem;
  color: var(--text);
  font-size: 0.82rem;
}

.toggle input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}

.toggle small {
  color: var(--muted);
}

@media (max-width: 900px) {
  .header,
  .schedule-summary {
    display: block;
  }

  .aside {
    margin-top: 0.75rem;
    justify-content: space-between;
  }

  .week-controls {
    justify-content: flex-start;
  }

  .stats {
    justify-content: flex-start;
    margin-top: 0.45rem;
  }

  .grid-scroll {
    display: none;
  }

  .mobile-schedule {
    display: block;
  }

  .entry-hover {
    display: none !important;
  }
}

@media (max-width: 520px) {
  .aside {
    display: grid;
    justify-content: stretch;
  }

  .settings-button {
    width: 100%;
  }

  .source-actions,
  .filter-actions {
    grid-template-columns: 1fr;
  }
}